package org.example.auth.util;

import java.security.MessageDigest;

/**
 * 加密工具类
 * 
 * @author lsliang
 * @date 2020/05/09
 */
public final class EncryUtils {

    private EncryUtils() {}

    private static final String SALT = "smallloss";

    public static String encodeMD5(String str) {
        str = str + SALT;
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        char[] charArray = str.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++) {
            byteArray[i] = (byte)charArray[i];
        }
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int)md5Bytes[i]) & 0xff;
            if (val < 16) {
                hexValue.append("0");
            }
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }
    
    public static void main(String[] args) {
        System.out.println(encodeMD5("112233"));
    }
}
